I have to install Tomcat 7 in Ubuntu 14.04. Since the procedure is very long, I don't want to make any errors since the beginning. So, the question is: is Ubuntu Server required for installing this device?
I don't think there is any issue in installing in either machines. You can as well install this in a normal machine. If you want a one-click install, you can go with tasksel.
$ sudo apt-get install tasksel
$ sudo tasksel
and choose Tomcat Server.